Revert of [ic] Experiment: disable map-specific handler cache.

src/ic/handler-compiler.cc

Index: src/ic/handler-compiler.cc
diff --git a/src/ic/handler-compiler.cc b/src/ic/handler-compiler.cc
index bfb64313bb831f8c6b100cd0c1d59aa05365e389..9b10045f80b51d8ca2e88bfceaf0c632b6fc1499 100644
--- a/src/ic/handler-compiler.cc
+++ b/src/ic/handler-compiler.cc
@@ -18,9 +18,6 @@
                                            Handle<Map> stub_holder,
                                            Code::Kind kind,
                                            CacheHolderFlag cache_holder) {
-  // TODO(ishell): Experiment: don't cache handlers in map-specific code cache.
-  return Handle<Code>();
-
   Code::Flags flags = Code::ComputeHandlerFlags(kind, cache_holder);
   Code* code = stub_holder->LookupInCodeCache(*name, flags);
   if (code == nullptr) return Handle<Code>();